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reiserfs: fix up lockdep warnings
[linux-2.6/mini2440.git] / drivers / pcmcia / ds.c
blob7bf78c127898d7e951c925c526d1c1d2b5d4621d
1 /*
2 * ds.c -- 16-bit PCMCIA core support
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 * (C) 2003 - 2006 Dominik Brodowski
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/errno.h>
20 #include <linux/list.h>
21 #include <linux/delay.h>
22 #include <linux/workqueue.h>
23 #include <linux/crc32.h>
24 #include <linux/firmware.h>
25 #include <linux/kref.h>
26 #include <linux/dma-mapping.h>
27
28 #define IN_CARD_SERVICES
29 #include <pcmcia/cs_types.h>
30 #include <pcmcia/cs.h>
31 #include <pcmcia/cistpl.h>
32 #include <pcmcia/ds.h>
33 #include <pcmcia/ss.h>
34
35 #include "cs_internal.h"
36 #include "ds_internal.h"
37
38 /*====================================================================*/
39
40 /* Module parameters */
41
42 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
43 MODULE_DESCRIPTION("PCMCIA Driver Services");
44 MODULE_LICENSE("GPL");
45
46 #ifdef DEBUG
47 int ds_pc_debug;
48
49 module_param_named(pc_debug, ds_pc_debug, int, 0644);
50
51 #define ds_dbg(lvl, fmt, arg...) do { \
52 if (ds_pc_debug > (lvl)) \
53 printk(KERN_DEBUG "ds: " fmt , ## arg); \
54 } while (0)
55 #else
56 #define ds_dbg(lvl, fmt, arg...) do { } while (0)
57 #endif
58
59 spinlock_t pcmcia_dev_list_lock;
60
61 /*====================================================================*/
62
63 /* code which was in cs.c before */
64
65 /* String tables for error messages */
66
67 typedef struct lookup_t {
68 int key;
69 char *msg;
70 } lookup_t;
71
72 static const lookup_t error_table[] = {
73 { CS_SUCCESS, "Operation succeeded" },
74 { CS_BAD_ADAPTER, "Bad adapter" },
75 { CS_BAD_ATTRIBUTE, "Bad attribute", },
76 { CS_BAD_BASE, "Bad base address" },
77 { CS_BAD_EDC, "Bad EDC" },
78 { CS_BAD_IRQ, "Bad IRQ" },
79 { CS_BAD_OFFSET, "Bad offset" },
80 { CS_BAD_PAGE, "Bad page number" },
81 { CS_READ_FAILURE, "Read failure" },
82 { CS_BAD_SIZE, "Bad size" },
83 { CS_BAD_SOCKET, "Bad socket" },
84 { CS_BAD_TYPE, "Bad type" },
85 { CS_BAD_VCC, "Bad Vcc" },
86 { CS_BAD_VPP, "Bad Vpp" },
87 { CS_BAD_WINDOW, "Bad window" },
88 { CS_WRITE_FAILURE, "Write failure" },
89 { CS_NO_CARD, "No card present" },
90 { CS_UNSUPPORTED_FUNCTION, "Usupported function" },
91 { CS_UNSUPPORTED_MODE, "Unsupported mode" },
92 { CS_BAD_SPEED, "Bad speed" },
93 { CS_BUSY, "Resource busy" },
94 { CS_GENERAL_FAILURE, "General failure" },
95 { CS_WRITE_PROTECTED, "Write protected" },
96 { CS_BAD_ARG_LENGTH, "Bad argument length" },
97 { CS_BAD_ARGS, "Bad arguments" },
98 { CS_CONFIGURATION_LOCKED, "Configuration locked" },
99 { CS_IN_USE, "Resource in use" },
100 { CS_NO_MORE_ITEMS, "No more items" },
101 { CS_OUT_OF_RESOURCE, "Out of resource" },
102 { CS_BAD_HANDLE, "Bad handle" },
103 { CS_BAD_TUPLE, "Bad CIS tuple" }
104 };
105
106
107 static const lookup_t service_table[] = {
108 { AccessConfigurationRegister, "AccessConfigurationRegister" },
109 { AddSocketServices, "AddSocketServices" },
110 { AdjustResourceInfo, "AdjustResourceInfo" },
111 { CheckEraseQueue, "CheckEraseQueue" },
112 { CloseMemory, "CloseMemory" },
113 { DeregisterClient, "DeregisterClient" },
114 { DeregisterEraseQueue, "DeregisterEraseQueue" },
115 { GetCardServicesInfo, "GetCardServicesInfo" },
116 { GetClientInfo, "GetClientInfo" },
117 { GetConfigurationInfo, "GetConfigurationInfo" },
118 { GetEventMask, "GetEventMask" },
119 { GetFirstClient, "GetFirstClient" },
120 { GetFirstRegion, "GetFirstRegion" },
121 { GetFirstTuple, "GetFirstTuple" },
122 { GetNextClient, "GetNextClient" },
123 { GetNextRegion, "GetNextRegion" },
124 { GetNextTuple, "GetNextTuple" },
125 { GetStatus, "GetStatus" },
126 { GetTupleData, "GetTupleData" },
127 { MapMemPage, "MapMemPage" },
128 { ModifyConfiguration, "ModifyConfiguration" },
129 { ModifyWindow, "ModifyWindow" },
130 { OpenMemory, "OpenMemory" },
131 { ParseTuple, "ParseTuple" },
132 { ReadMemory, "ReadMemory" },
133 { RegisterClient, "RegisterClient" },
134 { RegisterEraseQueue, "RegisterEraseQueue" },
135 { RegisterMTD, "RegisterMTD" },
136 { ReleaseConfiguration, "ReleaseConfiguration" },
137 { ReleaseIO, "ReleaseIO" },
138 { ReleaseIRQ, "ReleaseIRQ" },
139 { ReleaseWindow, "ReleaseWindow" },
140 { RequestConfiguration, "RequestConfiguration" },
141 { RequestIO, "RequestIO" },
142 { RequestIRQ, "RequestIRQ" },
143 { RequestSocketMask, "RequestSocketMask" },
144 { RequestWindow, "RequestWindow" },
145 { ResetCard, "ResetCard" },
146 { SetEventMask, "SetEventMask" },
147 { ValidateCIS, "ValidateCIS" },
148 { WriteMemory, "WriteMemory" },
149 { BindDevice, "BindDevice" },
150 { BindMTD, "BindMTD" },
151 { ReportError, "ReportError" },
152 { SuspendCard, "SuspendCard" },
153 { ResumeCard, "ResumeCard" },
154 { EjectCard, "EjectCard" },
155 { InsertCard, "InsertCard" },
156 { ReplaceCIS, "ReplaceCIS" }
157 };
158
159
160 static int pcmcia_report_error(struct pcmcia_device *p_dev, error_info_t *err)
161 {
162 int i;
163 char *serv;
164
165 if (!p_dev)
166 printk(KERN_NOTICE);
167 else
168 printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id);
169
170 for (i = 0; i < ARRAY_SIZE(service_table); i++)
171 if (service_table[i].key == err->func)
172 break;
173 if (i < ARRAY_SIZE(service_table))
174 serv = service_table[i].msg;
175 else
176 serv = "Unknown service number";
177
178 for (i = 0; i < ARRAY_SIZE(error_table); i++)
179 if (error_table[i].key == err->retcode)
180 break;
181 if (i < ARRAY_SIZE(error_table))
182 printk("%s: %s\n", serv, error_table[i].msg);
183 else
184 printk("%s: Unknown error code %#x\n", serv, err->retcode);
185
186 return CS_SUCCESS;
187 } /* report_error */
188
189 /* end of code which was in cs.c before */
190
191 /*======================================================================*/
192
193 void cs_error(struct pcmcia_device *p_dev, int func, int ret)
194 {
195 error_info_t err = { func, ret };
196 pcmcia_report_error(p_dev, &err);
197 }
198 EXPORT_SYMBOL(cs_error);
199
200
201 static void pcmcia_check_driver(struct pcmcia_driver *p_drv)
202 {
203 struct pcmcia_device_id *did = p_drv->id_table;
204 unsigned int i;
205 u32 hash;
206
207 if (!p_drv->probe || !p_drv->remove)
208 printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback "
209 "function\n", p_drv->drv.name);
210
211 while (did && did->match_flags) {
212 for (i=0; i<4; i++) {
213 if (!did->prod_id[i])
214 continue;
215
216 hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i]));
217 if (hash == did->prod_id_hash[i])
218 continue;
219
220 printk(KERN_DEBUG "pcmcia: %s: invalid hash for "
221 "product string \"%s\": is 0x%x, should "
222 "be 0x%x\n", p_drv->drv.name, did->prod_id[i],
223 did->prod_id_hash[i], hash);
224 printk(KERN_DEBUG "pcmcia: see "
225 "Documentation/pcmcia/devicetable.txt for "
226 "details\n");
227 }
228 did++;
229 }
230
231 return;
232 }
233
234
235 /*======================================================================*/
236
237
238 struct pcmcia_dynid {
239 struct list_head node;
240 struct pcmcia_device_id id;
241 };
242
243 /**
244 * pcmcia_store_new_id - add a new PCMCIA device ID to this driver and re-probe devices
245 * @driver: target device driver
246 * @buf: buffer for scanning device ID data
247 * @count: input size
248 *
249 * Adds a new dynamic PCMCIA device ID to this driver,
250 * and causes the driver to probe for all devices again.
251 */
252 static ssize_t
253 pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
254 {
255 struct pcmcia_dynid *dynid;
256 struct pcmcia_driver *pdrv = to_pcmcia_drv(driver);
257 __u16 match_flags, manf_id, card_id;
258 __u8 func_id, function, device_no;
259 __u32 prod_id_hash[4] = {0, 0, 0, 0};
260 int fields=0;
261 int retval = 0;
262
263 fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x",
264 &match_flags, &manf_id, &card_id, &func_id, &function, &device_no,
265 &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]);
266 if (fields < 6)
267 return -EINVAL;
268
269 dynid = kzalloc(sizeof(struct pcmcia_dynid), GFP_KERNEL);
270 if (!dynid)
271 return -ENOMEM;
272
273 INIT_LIST_HEAD(&dynid->node);
274 dynid->id.match_flags = match_flags;
275 dynid->id.manf_id = manf_id;
276 dynid->id.card_id = card_id;
277 dynid->id.func_id = func_id;
278 dynid->id.function = function;
279 dynid->id.device_no = device_no;
280 memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4);
281
282 spin_lock(&pdrv->dynids.lock);
283 list_add_tail(&pdrv->dynids.list, &dynid->node);
284 spin_unlock(&pdrv->dynids.lock);
285
286 if (get_driver(&pdrv->drv)) {
287 retval = driver_attach(&pdrv->drv);
288 put_driver(&pdrv->drv);
289 }
290
291 if (retval)
292 return retval;
293 return count;
294 }
295 static DRIVER_ATTR(new_id, S_IWUSR, NULL, pcmcia_store_new_id);
296
297 static void
298 pcmcia_free_dynids(struct pcmcia_driver *drv)
299 {
300 struct pcmcia_dynid *dynid, *n;
301
302 spin_lock(&drv->dynids.lock);
303 list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
304 list_del(&dynid->node);
305 kfree(dynid);
306 }
307 spin_unlock(&drv->dynids.lock);
308 }
309
310 static int
311 pcmcia_create_newid_file(struct pcmcia_driver *drv)
312 {
313 int error = 0;
314 if (drv->probe != NULL)
315 error = sysfs_create_file(&drv->drv.kobj,
316 &driver_attr_new_id.attr);
317 return error;
318 }
319
320
321 /**
322 * pcmcia_register_driver - register a PCMCIA driver with the bus core
323 *
324 * Registers a PCMCIA driver with the PCMCIA bus core.
325 */
326 int pcmcia_register_driver(struct pcmcia_driver *driver)
327 {
328 int error;
329
330 if (!driver)
331 return -EINVAL;
332
333 pcmcia_check_driver(driver);
334
335 /* initialize common fields */
336 driver->drv.bus = &pcmcia_bus_type;
337 driver->drv.owner = driver->owner;
338 spin_lock_init(&driver->dynids.lock);
339 INIT_LIST_HEAD(&driver->dynids.list);
340
341 ds_dbg(3, "registering driver %s\n", driver->drv.name);
342
343 error = driver_register(&driver->drv);
344 if (error < 0)
345 return error;
346
347 error = pcmcia_create_newid_file(driver);
348 if (error)
349 driver_unregister(&driver->drv);
350
351 return error;
352 }
353 EXPORT_SYMBOL(pcmcia_register_driver);
354
355 /**
356 * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core
357 */
358 void pcmcia_unregister_driver(struct pcmcia_driver *driver)
359 {
360 ds_dbg(3, "unregistering driver %s\n", driver->drv.name);
361 driver_unregister(&driver->drv);
362 pcmcia_free_dynids(driver);
363 }
364 EXPORT_SYMBOL(pcmcia_unregister_driver);
365
366
367 /* pcmcia_device handling */
368
369 struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev)
370 {
371 struct device *tmp_dev;
372 tmp_dev = get_device(&p_dev->dev);
373 if (!tmp_dev)
374 return NULL;
375 return to_pcmcia_dev(tmp_dev);
376 }
377
378 void pcmcia_put_dev(struct pcmcia_device *p_dev)
379 {
380 if (p_dev)
381 put_device(&p_dev->dev);
382 }
383
384 static void pcmcia_release_function(struct kref *ref)
385 {
386 struct config_t *c = container_of(ref, struct config_t, ref);
387 ds_dbg(1, "releasing config_t\n");
388 kfree(c);
389 }
390
391 static void pcmcia_release_dev(struct device *dev)
392 {
393 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
394 ds_dbg(1, "releasing device %s\n", p_dev->dev.bus_id);
395 pcmcia_put_socket(p_dev->socket);
396 kfree(p_dev->devname);
397 kref_put(&p_dev->function_config->ref, pcmcia_release_function);
398 kfree(p_dev);
399 }
400
401 static void pcmcia_add_device_later(struct pcmcia_socket *s, int mfc)
402 {
403 if (!s->pcmcia_state.device_add_pending) {
404 ds_dbg(1, "scheduling to add %s secondary"
405 " device to %d\n", mfc ? "mfc" : "pfc", s->sock);
406 s->pcmcia_state.device_add_pending = 1;
407 s->pcmcia_state.mfc_pfc = mfc;
408 schedule_work(&s->device_add);
409 }
410 return;
411 }
412
413 static int pcmcia_device_probe(struct device * dev)
414 {
415 struct pcmcia_device *p_dev;
416 struct pcmcia_driver *p_drv;
417 struct pcmcia_device_id *did;
418 struct pcmcia_socket *s;
419 cistpl_config_t cis_config;
420 int ret = 0;
421
422 dev = get_device(dev);
423 if (!dev)
424 return -ENODEV;
425
426 p_dev = to_pcmcia_dev(dev);
427 p_drv = to_pcmcia_drv(dev->driver);
428 s = p_dev->socket;
429
430 ds_dbg(1, "trying to bind %s to %s\n", p_dev->dev.bus_id,
431 p_drv->drv.name);
432
433 if ((!p_drv->probe) || (!p_dev->function_config) ||
434 (!try_module_get(p_drv->owner))) {
435 ret = -EINVAL;
436 goto put_dev;
437 }
438
439 /* set up some more device information */
440 ret = pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_CONFIG,
441 &cis_config);
442 if (!ret) {
443 p_dev->conf.ConfigBase = cis_config.base;
444 p_dev->conf.Present = cis_config.rmask[0];
445 } else {
446 printk(KERN_INFO "pcmcia: could not parse base and rmask0 of CIS\n");
447 p_dev->conf.ConfigBase = 0;
448 p_dev->conf.Present = 0;
449 }
450
451 ret = p_drv->probe(p_dev);
452 if (ret) {
453 ds_dbg(1, "binding %s to %s failed with %d\n",
454 p_dev->dev.bus_id, p_drv->drv.name, ret);
455 goto put_module;
456 }
457
458 /* handle pseudo multifunction devices:
459 * there are at most two pseudo multifunction devices.
460 * if we're matching against the first, schedule a
461 * call which will then check whether there are two
462 * pseudo devices, and if not, add the second one.
463 */
464 did = p_dev->dev.driver_data;
465 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
466 (p_dev->socket->device_count == 1) && (p_dev->device_no == 0))
467 pcmcia_add_device_later(p_dev->socket, 0);
468
469 put_module:
470 if (ret)
471 module_put(p_drv->owner);
472 put_dev:
473 if (ret)
474 put_device(dev);
475 return (ret);
476 }
477
478
479 /*
480 * Removes a PCMCIA card from the device tree and socket list.
481 */
482 static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover)
483 {
484 struct pcmcia_device *p_dev;
485 struct pcmcia_device *tmp;
486 unsigned long flags;
487
488 ds_dbg(2, "pcmcia_card_remove(%d) %s\n", s->sock,
489 leftover ? leftover->devname : "");
490
491 if (!leftover)
492 s->device_count = 0;
493 else
494 s->device_count = 1;
495
496 /* unregister all pcmcia_devices registered with this socket, except leftover */
497 list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) {
498 if (p_dev == leftover)
499 continue;
500
501 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
502 list_del(&p_dev->socket_device_list);
503 p_dev->_removed=1;
504 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
505
506 ds_dbg(2, "unregistering device %s\n", p_dev->dev.bus_id);
507 device_unregister(&p_dev->dev);
508 }
509
510 return;
511 }
512
513 static int pcmcia_device_remove(struct device * dev)
514 {
515 struct pcmcia_device *p_dev;
516 struct pcmcia_driver *p_drv;
517 struct pcmcia_device_id *did;
518 int i;
519
520 p_dev = to_pcmcia_dev(dev);
521 p_drv = to_pcmcia_drv(dev->driver);
522
523 ds_dbg(1, "removing device %s\n", p_dev->dev.bus_id);
524
525 /* If we're removing the primary module driving a
526 * pseudo multi-function card, we need to unbind
527 * all devices
528 */
529 did = p_dev->dev.driver_data;
530 if (did && (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) &&
531 (p_dev->socket->device_count != 0) &&
532 (p_dev->device_no == 0))
533 pcmcia_card_remove(p_dev->socket, p_dev);
534
535 /* detach the "instance" */
536 if (!p_drv)
537 return 0;
538
539 if (p_drv->remove)
540 p_drv->remove(p_dev);
541
542 p_dev->dev_node = NULL;
543
544 /* check for proper unloading */
545 if (p_dev->_irq || p_dev->_io || p_dev->_locked)
546 printk(KERN_INFO "pcmcia: driver %s did not release config properly\n",
547 p_drv->drv.name);
548
549 for (i = 0; i < MAX_WIN; i++)
550 if (p_dev->_win & CLIENT_WIN_REQ(i))
551 printk(KERN_INFO "pcmcia: driver %s did not release windows properly\n",
552 p_drv->drv.name);
553
554 /* references from pcmcia_probe_device */
555 pcmcia_put_dev(p_dev);
556 module_put(p_drv->owner);
557
558 return 0;
559 }
560
561
562 /*
563 * pcmcia_device_query -- determine information about a pcmcia device
564 */
565 static int pcmcia_device_query(struct pcmcia_device *p_dev)
566 {
567 cistpl_manfid_t manf_id;
568 cistpl_funcid_t func_id;
569 cistpl_vers_1_t *vers1;
570 unsigned int i;
571
572 vers1 = kmalloc(sizeof(*vers1), GFP_KERNEL);
573 if (!vers1)
574 return -ENOMEM;
575
576 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
577 CISTPL_MANFID, &manf_id)) {
578 p_dev->manf_id = manf_id.manf;
579 p_dev->card_id = manf_id.card;
580 p_dev->has_manf_id = 1;
581 p_dev->has_card_id = 1;
582 }
583
584 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
585 CISTPL_FUNCID, &func_id)) {
586 p_dev->func_id = func_id.func;
587 p_dev->has_func_id = 1;
588 } else {
589 /* rule of thumb: cards with no FUNCID, but with
590 * common memory device geometry information, are
591 * probably memory cards (from pcmcia-cs) */
592 cistpl_device_geo_t *devgeo;
593
594 devgeo = kmalloc(sizeof(*devgeo), GFP_KERNEL);
595 if (!devgeo) {
596 kfree(vers1);
597 return -ENOMEM;
598 }
599 if (!pccard_read_tuple(p_dev->socket, p_dev->func,
600 CISTPL_DEVICE_GEO, devgeo)) {
601 ds_dbg(0, "mem device geometry probably means "
602 "FUNCID_MEMORY\n");
603 p_dev->func_id = CISTPL_FUNCID_MEMORY;
604 p_dev->has_func_id = 1;
605 }
606 kfree(devgeo);
607 }
608
609 if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1,
610 vers1)) {
611 for (i=0; i < vers1->ns; i++) {
612 char *tmp;
613 unsigned int length;
614
615 tmp = vers1->str + vers1->ofs[i];
616
617 length = strlen(tmp) + 1;
618 if ((length < 2) || (length > 255))
619 continue;
620
621 p_dev->prod_id[i] = kmalloc(sizeof(char) * length,
622 GFP_KERNEL);
623 if (!p_dev->prod_id[i])
624 continue;
625
626 p_dev->prod_id[i] = strncpy(p_dev->prod_id[i],
627 tmp, length);
628 }
629 }
630
631 kfree(vers1);
632 return 0;
633 }
634
635
636 /* device_add_lock is needed to avoid double registration by cardmgr and kernel.
637 * Serializes pcmcia_device_add; will most likely be removed in future.
638 *
639 * While it has the caveat that adding new PCMCIA devices inside(!) device_register()
640 * won't work, this doesn't matter much at the moment: the driver core doesn't
641 * support it either.
642 */
643 static DEFINE_MUTEX(device_add_lock);
644
645 struct pcmcia_device * pcmcia_device_add(struct pcmcia_socket *s, unsigned int function)
646 {
647 struct pcmcia_device *p_dev, *tmp_dev;
648 unsigned long flags;
649 int bus_id_len;
650
651 s = pcmcia_get_socket(s);
652 if (!s)
653 return NULL;
654
655 mutex_lock(&device_add_lock);
656
657 ds_dbg(3, "adding device to %d, function %d\n", s->sock, function);
658
659 /* max of 4 devices per card */
660 if (s->device_count == 4)
661 goto err_put;
662
663 p_dev = kzalloc(sizeof(struct pcmcia_device), GFP_KERNEL);
664 if (!p_dev)
665 goto err_put;
666
667 p_dev->socket = s;
668 p_dev->device_no = (s->device_count++);
669 p_dev->func = function;
670
671 p_dev->dev.bus = &pcmcia_bus_type;
672 p_dev->dev.parent = s->dev.parent;
673 p_dev->dev.release = pcmcia_release_dev;
674 /* by default don't allow DMA */
675 p_dev->dma_mask = DMA_MASK_NONE;
676 p_dev->dev.dma_mask = &p_dev->dma_mask;
677 bus_id_len = sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no);
678
679 p_dev->devname = kmalloc(6 + bus_id_len + 1, GFP_KERNEL);
680 if (!p_dev->devname)
681 goto err_free;
682 sprintf (p_dev->devname, "pcmcia%s", p_dev->dev.bus_id);
683 ds_dbg(3, "devname is %s\n", p_dev->devname);
684
685 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
686
687 /*
688 * p_dev->function_config must be the same for all card functions.
689 * Note that this is serialized by the device_add_lock, so that
690 * only one such struct will be created.
691 */
692 list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list)
693 if (p_dev->func == tmp_dev->func) {
694 p_dev->function_config = tmp_dev->function_config;
695 kref_get(&p_dev->function_config->ref);
696 }
697
698 /* Add to the list in pcmcia_bus_socket */
699 list_add(&p_dev->socket_device_list, &s->devices_list);
700
701 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
702
703 if (!p_dev->function_config) {
704 ds_dbg(3, "creating config_t for %s\n", p_dev->dev.bus_id);
705 p_dev->function_config = kzalloc(sizeof(struct config_t),
706 GFP_KERNEL);
707 if (!p_dev->function_config)
708 goto err_unreg;
709 kref_init(&p_dev->function_config->ref);
710 }
711
712 printk(KERN_NOTICE "pcmcia: registering new device %s\n",
713 p_dev->devname);
714
715 pcmcia_device_query(p_dev);
716
717 if (device_register(&p_dev->dev))
718 goto err_unreg;
719
720 mutex_unlock(&device_add_lock);
721
722 return p_dev;
723
724 err_unreg:
725 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
726 list_del(&p_dev->socket_device_list);
727 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
728
729 err_free:
730 kfree(p_dev->devname);
731 kfree(p_dev);
732 s->device_count--;
733 err_put:
734 mutex_unlock(&device_add_lock);
735 pcmcia_put_socket(s);
736
737 return NULL;
738 }
739
740
741 static int pcmcia_card_add(struct pcmcia_socket *s)
742 {
743 cisinfo_t cisinfo;
744 cistpl_longlink_mfc_t mfc;
745 unsigned int no_funcs, i;
746 int ret = 0;
747
748 if (!(s->resource_setup_done)) {
749 ds_dbg(3, "no resources available, delaying card_add\n");
750 return -EAGAIN; /* try again, but later... */
751 }
752
753 if (pcmcia_validate_mem(s)) {
754 ds_dbg(3, "validating mem resources failed, "
755 "delaying card_add\n");
756 return -EAGAIN; /* try again, but later... */
757 }
758
759 ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo);
760 if (ret || !cisinfo.Chains) {
761 ds_dbg(0, "invalid CIS or invalid resources\n");
762 return -ENODEV;
763 }
764
765 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
766 no_funcs = mfc.nfn;
767 else
768 no_funcs = 1;
769 s->functions = no_funcs;
770
771 for (i=0; i < no_funcs; i++)
772 pcmcia_device_add(s, i);
773
774 return (ret);
775 }
776
777
778 static void pcmcia_delayed_add_device(struct work_struct *work)
779 {
780 struct pcmcia_socket *s =
781 container_of(work, struct pcmcia_socket, device_add);
782 ds_dbg(1, "adding additional device to %d\n", s->sock);
783 pcmcia_device_add(s, s->pcmcia_state.mfc_pfc);
784 s->pcmcia_state.device_add_pending = 0;
785 s->pcmcia_state.mfc_pfc = 0;
786 }
787
788 static int pcmcia_requery(struct device *dev, void * _data)
789 {
790 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
791 if (!p_dev->dev.driver) {
792 ds_dbg(1, "update device information for %s\n",
793 p_dev->dev.bus_id);
794 pcmcia_device_query(p_dev);
795 }
796
797 return 0;
798 }
799
800 static void pcmcia_bus_rescan(struct pcmcia_socket *skt, int new_cis)
801 {
802 int no_devices = 0;
803 int ret = 0;
804 unsigned long flags;
805
806 /* must be called with skt_mutex held */
807 ds_dbg(0, "re-scanning socket %d\n", skt->sock);
808
809 spin_lock_irqsave(&pcmcia_dev_list_lock, flags);
810 if (list_empty(&skt->devices_list))
811 no_devices = 1;
812 spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags);
813
814 /* If this is because of a CIS override, start over */
815 if (new_cis && !no_devices)
816 pcmcia_card_remove(skt, NULL);
817
818 /* if no devices were added for this socket yet because of
819 * missing resource information or other trouble, we need to
820 * do this now. */
821 if (no_devices || new_cis) {
822 ret = pcmcia_card_add(skt);
823 if (ret)
824 return;
825 }
826
827 /* some device information might have changed because of a CIS
828 * update or because we can finally read it correctly... so
829 * determine it again, overwriting old values if necessary. */
830 bus_for_each_dev(&pcmcia_bus_type, NULL, NULL, pcmcia_requery);
831
832 /* we re-scan all devices, not just the ones connected to this
833 * socket. This does not matter, though. */
834 ret = bus_rescan_devices(&pcmcia_bus_type);
835 if (ret)
836 printk(KERN_INFO "pcmcia: bus_rescan_devices failed\n");
837 }
838
839 #ifdef CONFIG_PCMCIA_LOAD_CIS
840
841 /**
842 * pcmcia_load_firmware - load CIS from userspace if device-provided is broken
843 * @dev - the pcmcia device which needs a CIS override
844 * @filename - requested filename in /lib/firmware/
845 *
846 * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if
847 * the one provided by the card is broken. The firmware files reside in
848 * /lib/firmware/ in userspace.
849 */
850 static int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
851 {
852 struct pcmcia_socket *s = dev->socket;
853 const struct firmware *fw;
854 char path[20];
855 int ret = -ENOMEM;
856 int no_funcs;
857 int old_funcs;
858 cisdump_t *cis;
859 cistpl_longlink_mfc_t mfc;
860
861 if (!filename)
862 return -EINVAL;
863
864 ds_dbg(1, "trying to load CIS file %s\n", filename);
865
866 if (strlen(filename) > 14) {
867 printk(KERN_WARNING "pcmcia: CIS filename is too long\n");
868 return -EINVAL;
869 }
870
871 snprintf(path, 20, "%s", filename);
872
873 if (request_firmware(&fw, path, &dev->dev) == 0) {
874 if (fw->size >= CISTPL_MAX_CIS_SIZE) {
875 ret = -EINVAL;
876 printk(KERN_ERR "pcmcia: CIS override is too big\n");
877 goto release;
878 }
879
880 cis = kzalloc(sizeof(cisdump_t), GFP_KERNEL);
881 if (!cis) {
882 ret = -ENOMEM;
883 goto release;
884 }
885
886 cis->Length = fw->size + 1;
887 memcpy(cis->Data, fw->data, fw->size);
888
889 if (!pcmcia_replace_cis(s, cis))
890 ret = 0;
891 else {
892 printk(KERN_ERR "pcmcia: CIS override failed\n");
893 goto release;
894 }
895
896
897 /* update information */
898 pcmcia_device_query(dev);
899
900 /* does this cis override add or remove functions? */
901 old_funcs = s->functions;
902
903 if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc))
904 no_funcs = mfc.nfn;
905 else
906 no_funcs = 1;
907 s->functions = no_funcs;
908
909 if (old_funcs > no_funcs)
910 pcmcia_card_remove(s, dev);
911 else if (no_funcs > old_funcs)
912 pcmcia_add_device_later(s, 1);
913 }
914 release:
915 release_firmware(fw);
916
917 return (ret);
918 }
919
920 #else /* !CONFIG_PCMCIA_LOAD_CIS */
921
922 static inline int pcmcia_load_firmware(struct pcmcia_device *dev, char * filename)
923 {
924 return -ENODEV;
925 }
926
927 #endif
928
929
930 static inline int pcmcia_devmatch(struct pcmcia_device *dev,
931 struct pcmcia_device_id *did)
932 {
933 if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) {
934 if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id))
935 return 0;
936 }
937
938 if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) {
939 if ((!dev->has_card_id) || (dev->card_id != did->card_id))
940 return 0;
941 }
942
943 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) {
944 if (dev->func != did->function)
945 return 0;
946 }
947
948 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) {
949 if (!dev->prod_id[0])
950 return 0;
951 if (strcmp(did->prod_id[0], dev->prod_id[0]))
952 return 0;
953 }
954
955 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) {
956 if (!dev->prod_id[1])
957 return 0;
958 if (strcmp(did->prod_id[1], dev->prod_id[1]))
959 return 0;
960 }
961
962 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) {
963 if (!dev->prod_id[2])
964 return 0;
965 if (strcmp(did->prod_id[2], dev->prod_id[2]))
966 return 0;
967 }
968
969 if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) {
970 if (!dev->prod_id[3])
971 return 0;
972 if (strcmp(did->prod_id[3], dev->prod_id[3]))
973 return 0;
974 }
975
976 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) {
977 if (dev->device_no != did->device_no)
978 return 0;
979 }
980
981 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) {
982 if ((!dev->has_func_id) || (dev->func_id != did->func_id))
983 return 0;
984
985 /* if this is a pseudo-multi-function device,
986 * we need explicit matches */
987 if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO)
988 return 0;
989 if (dev->device_no)
990 return 0;
991
992 /* also, FUNC_ID matching needs to be activated by userspace
993 * after it has re-checked that there is no possible module
994 * with a prod_id/manf_id/card_id match.
995 */
996 ds_dbg(0, "skipping FUNC_ID match for %s until userspace "
997 "interaction\n", dev->dev.bus_id);
998 if (!dev->allow_func_id_match)
999 return 0;
1000 }
1001
1002 if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) {
1003 ds_dbg(0, "device %s needs a fake CIS\n", dev->dev.bus_id);
1004 if (!dev->socket->fake_cis)
1005 pcmcia_load_firmware(dev, did->cisfile);
1006
1007 if (!dev->socket->fake_cis)
1008 return 0;
1009 }
1010
1011 if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) {
1012 int i;
1013 for (i=0; i<4; i++)
1014 if (dev->prod_id[i])
1015 return 0;
1016 if (dev->has_manf_id || dev->has_card_id || dev->has_func_id)
1017 return 0;
1018 }
1019
1020 dev->dev.driver_data = (void *) did;
1021
1022 return 1;
1023 }
1024
1025
1026 static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) {
1027 struct pcmcia_device * p_dev = to_pcmcia_dev(dev);
1028 struct pcmcia_driver * p_drv = to_pcmcia_drv(drv);
1029 struct pcmcia_device_id *did = p_drv->id_table;
1030 struct pcmcia_dynid *dynid;
1031
1032 /* match dynamic devices first */
1033 spin_lock(&p_drv->dynids.lock);
1034 list_for_each_entry(dynid, &p_drv->dynids.list, node) {
1035 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
1036 drv->name);
1037 if (pcmcia_devmatch(p_dev, &dynid->id)) {
1038 ds_dbg(0, "matched %s to %s\n", dev->bus_id,
1039 drv->name);
1040 spin_unlock(&p_drv->dynids.lock);
1041 return 1;
1042 }
1043 }
1044 spin_unlock(&p_drv->dynids.lock);
1045
1046 #ifdef CONFIG_PCMCIA_IOCTL
1047 /* matching by cardmgr */
1048 if (p_dev->cardmgr == p_drv) {
1049 ds_dbg(0, "cardmgr matched %s to %s\n", dev->bus_id,
1050 drv->name);
1051 return 1;
1052 }
1053 #endif
1054
1055 while (did && did->match_flags) {
1056 ds_dbg(3, "trying to match %s to %s\n", dev->bus_id,
1057 drv->name);
1058 if (pcmcia_devmatch(p_dev, did)) {
1059 ds_dbg(0, "matched %s to %s\n", dev->bus_id,
1060 drv->name);
1061 return 1;
1062 }
1063 did++;
1064 }
1065
1066 return 0;
1067 }
1068
1069 #ifdef CONFIG_HOTPLUG
1070
1071 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1072 {
1073 struct pcmcia_device *p_dev;
1074 int i;
1075 u32 hash[4] = { 0, 0, 0, 0};
1076
1077 if (!dev)
1078 return -ENODEV;
1079
1080 p_dev = to_pcmcia_dev(dev);
1081
1082 /* calculate hashes */
1083 for (i=0; i<4; i++) {
1084 if (!p_dev->prod_id[i])
1085 continue;
1086 hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i]));
1087 }
1088
1089 if (add_uevent_var(env, "SOCKET_NO=%u", p_dev->socket->sock))
1090 return -ENOMEM;
1091
1092 if (add_uevent_var(env, "DEVICE_NO=%02X", p_dev->device_no))
1093 return -ENOMEM;
1094
1095 if (add_uevent_var(env, "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1096 "pa%08Xpb%08Xpc%08Xpd%08X",
1097 p_dev->has_manf_id ? p_dev->manf_id : 0,
1098 p_dev->has_card_id ? p_dev->card_id : 0,
1099 p_dev->has_func_id ? p_dev->func_id : 0,
1100 p_dev->func,
1101 p_dev->device_no,
1102 hash[0],
1103 hash[1],
1104 hash[2],
1105 hash[3]))
1106 return -ENOMEM;
1107
1108 return 0;
1109 }
1110
1111 #else
1112
1113 static int pcmcia_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
1114 {
1115 return -ENODEV;
1116 }
1117
1118 #endif
1119
1120 /************************ runtime PM support ***************************/
1121
1122 static int pcmcia_dev_suspend(struct device *dev, pm_message_t state);
1123 static int pcmcia_dev_resume(struct device *dev);
1124
1125 static int runtime_suspend(struct device *dev)
1126 {
1127 int rc;
1128
1129 down(&dev->sem);
1130 rc = pcmcia_dev_suspend(dev, PMSG_SUSPEND);
1131 up(&dev->sem);
1132 if (!rc)
1133 dev->power.power_state.event = PM_EVENT_SUSPEND;
1134 return rc;
1135 }
1136
1137 static void runtime_resume(struct device *dev)
1138 {
1139 int rc;
1140
1141 down(&dev->sem);
1142 rc = pcmcia_dev_resume(dev);
1143 up(&dev->sem);
1144 if (!rc)
1145 dev->power.power_state.event = PM_EVENT_ON;
1146 }
1147
1148 /************************ per-device sysfs output ***************************/
1149
1150 #define pcmcia_device_attr(field, test, format) \
1151 static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1152 { \
1153 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1154 return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \
1155 }
1156
1157 #define pcmcia_device_stringattr(name, field) \
1158 static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
1159 { \
1160 struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \
1161 return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \
1162 }
1163
1164 pcmcia_device_attr(func, socket, "0x%02x\n");
1165 pcmcia_device_attr(func_id, has_func_id, "0x%02x\n");
1166 pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n");
1167 pcmcia_device_attr(card_id, has_card_id, "0x%04x\n");
1168 pcmcia_device_stringattr(prod_id1, prod_id[0]);
1169 pcmcia_device_stringattr(prod_id2, prod_id[1]);
1170 pcmcia_device_stringattr(prod_id3, prod_id[2]);
1171 pcmcia_device_stringattr(prod_id4, prod_id[3]);
1172
1173
1174 static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
1175 {
1176 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1177
1178 if (p_dev->suspended)
1179 return sprintf(buf, "off\n");
1180 else
1181 return sprintf(buf, "on\n");
1182 }
1183
1184 static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
1185 const char *buf, size_t count)
1186 {
1187 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1188 int ret = 0;
1189
1190 if (!count)
1191 return -EINVAL;
1192
1193 if ((!p_dev->suspended) && !strncmp(buf, "off", 3))
1194 ret = runtime_suspend(dev);
1195 else if (p_dev->suspended && !strncmp(buf, "on", 2))
1196 runtime_resume(dev);
1197
1198 return ret ? ret : count;
1199 }
1200
1201
1202 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1203 {
1204 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1205 int i;
1206 u32 hash[4] = { 0, 0, 0, 0};
1207
1208 /* calculate hashes */
1209 for (i=0; i<4; i++) {
1210 if (!p_dev->prod_id[i])
1211 continue;
1212 hash[i] = crc32(0,p_dev->prod_id[i],strlen(p_dev->prod_id[i]));
1213 }
1214 return sprintf(buf, "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X"
1215 "pa%08Xpb%08Xpc%08Xpd%08X\n",
1216 p_dev->has_manf_id ? p_dev->manf_id : 0,
1217 p_dev->has_card_id ? p_dev->card_id : 0,
1218 p_dev->has_func_id ? p_dev->func_id : 0,
1219 p_dev->func, p_dev->device_no,
1220 hash[0], hash[1], hash[2], hash[3]);
1221 }
1222
1223 static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
1224 struct device_attribute *attr, const char *buf, size_t count)
1225 {
1226 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1227 int ret;
1228
1229 if (!count)
1230 return -EINVAL;
1231
1232 mutex_lock(&p_dev->socket->skt_mutex);
1233 p_dev->allow_func_id_match = 1;
1234 mutex_unlock(&p_dev->socket->skt_mutex);
1235
1236 ret = bus_rescan_devices(&pcmcia_bus_type);
1237 if (ret)
1238 printk(KERN_INFO "pcmcia: bus_rescan_devices failed after "
1239 "allowing func_id matches\n");
1240
1241 return count;
1242 }
1243
1244 static struct device_attribute pcmcia_dev_attrs[] = {
1245 __ATTR(function, 0444, func_show, NULL),
1246 __ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
1247 __ATTR_RO(func_id),
1248 __ATTR_RO(manf_id),
1249 __ATTR_RO(card_id),
1250 __ATTR_RO(prod_id1),
1251 __ATTR_RO(prod_id2),
1252 __ATTR_RO(prod_id3),
1253 __ATTR_RO(prod_id4),
1254 __ATTR_RO(modalias),
1255 __ATTR(allow_func_id_match, 0200, NULL, pcmcia_store_allow_func_id_match),
1256 __ATTR_NULL,
1257 };
1258
1259 /* PM support, also needed for reset */
1260
1261 static int pcmcia_dev_suspend(struct device * dev, pm_message_t state)
1262 {
1263 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1264 struct pcmcia_driver *p_drv = NULL;
1265 int ret = 0;
1266
1267 ds_dbg(2, "suspending %s\n", dev->bus_id);
1268
1269 if (dev->driver)
1270 p_drv = to_pcmcia_drv(dev->driver);
1271
1272 if (!p_drv)
1273 goto out;
1274
1275 if (p_drv->suspend) {
1276 ret = p_drv->suspend(p_dev);
1277 if (ret) {
1278 printk(KERN_ERR "pcmcia: device %s (driver %s) did "
1279 "not want to go to sleep (%d)\n",
1280 p_dev->devname, p_drv->drv.name, ret);
1281 goto out;
1282 }
1283 }
1284
1285 if (p_dev->device_no == p_dev->func) {
1286 ds_dbg(2, "releasing configuration for %s\n", dev->bus_id);
1287 pcmcia_release_configuration(p_dev);
1288 }
1289
1290 out:
1291 if (!ret)
1292 p_dev->suspended = 1;
1293 return ret;
1294 }
1295
1296
1297 static int pcmcia_dev_resume(struct device * dev)
1298 {
1299 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1300 struct pcmcia_driver *p_drv = NULL;
1301 int ret = 0;
1302
1303 ds_dbg(2, "resuming %s\n", dev->bus_id);
1304
1305 if (dev->driver)
1306 p_drv = to_pcmcia_drv(dev->driver);
1307
1308 if (!p_drv)
1309 goto out;
1310
1311 if (p_dev->device_no == p_dev->func) {
1312 ds_dbg(2, "requesting configuration for %s\n", dev->bus_id);
1313 ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
1314 if (ret)
1315 goto out;
1316 }
1317
1318 if (p_drv->resume)
1319 ret = p_drv->resume(p_dev);
1320
1321 out:
1322 if (!ret)
1323 p_dev->suspended = 0;
1324 return ret;
1325 }
1326
1327
1328 static int pcmcia_bus_suspend_callback(struct device *dev, void * _data)
1329 {
1330 struct pcmcia_socket *skt = _data;
1331 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1332
1333 if (p_dev->socket != skt || p_dev->suspended)
1334 return 0;
1335
1336 return runtime_suspend(dev);
1337 }
1338
1339 static int pcmcia_bus_resume_callback(struct device *dev, void * _data)
1340 {
1341 struct pcmcia_socket *skt = _data;
1342 struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
1343
1344 if (p_dev->socket != skt || !p_dev->suspended)
1345 return 0;
1346
1347 runtime_resume(dev);
1348
1349 return 0;
1350 }
1351
1352 static int pcmcia_bus_resume(struct pcmcia_socket *skt)
1353 {
1354 ds_dbg(2, "resuming socket %d\n", skt->sock);
1355 bus_for_each_dev(&pcmcia_bus_type, NULL, skt, pcmcia_bus_resume_callback);
1356 return 0;
1357 }
1358
1359 static int pcmcia_bus_suspend(struct pcmcia_socket *skt)
1360 {
1361 ds_dbg(2, "suspending socket %d\n", skt->sock);
1362 if (bus_for_each_dev(&pcmcia_bus_type, NULL, skt,
1363 pcmcia_bus_suspend_callback)) {
1364 pcmcia_bus_resume(skt);
1365 return -EIO;
1366 }
1367 return 0;
1368 }
1369
1370
1371 /*======================================================================
1372
1373 The card status event handler.
1374
1375 ======================================================================*/
1376
1377 /* Normally, the event is passed to individual drivers after
1378 * informing userspace. Only for CS_EVENT_CARD_REMOVAL this
1379 * is inversed to maintain historic compatibility.
1380 */
1381
1382 static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
1383 {
1384 struct pcmcia_socket *s = pcmcia_get_socket(skt);
1385
1386 if (!s) {
1387 printk(KERN_ERR "PCMCIA obtaining reference to socket %p " \
1388 "failed, event 0x%x lost!\n", skt, event);
1389 return -ENODEV;
1390 }
1391
1392 ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n",
1393 event, priority, skt);
1394
1395 switch (event) {
1396 case CS_EVENT_CARD_REMOVAL:
1397 s->pcmcia_state.present = 0;
1398 pcmcia_card_remove(skt, NULL);
1399 handle_event(skt, event);
1400 break;
1401
1402 case CS_EVENT_CARD_INSERTION:
1403 s->pcmcia_state.present = 1;
1404 pcmcia_card_add(skt);
1405 handle_event(skt, event);
1406 break;
1407
1408 case CS_EVENT_EJECTION_REQUEST:
1409 break;
1410
1411 case CS_EVENT_PM_SUSPEND:
1412 case CS_EVENT_PM_RESUME:
1413 case CS_EVENT_RESET_PHYSICAL:
1414 case CS_EVENT_CARD_RESET:
1415 default:
1416 handle_event(skt, event);
1417 break;
1418 }
1419
1420 pcmcia_put_socket(s);
1421
1422 return 0;
1423 } /* ds_event */
1424
1425
1426 struct pcmcia_device * pcmcia_dev_present(struct pcmcia_device *_p_dev)
1427 {
1428 struct pcmcia_device *p_dev;
1429 struct pcmcia_device *ret = NULL;
1430
1431 p_dev = pcmcia_get_dev(_p_dev);
1432 if (!p_dev)
1433 return NULL;
1434
1435 if (!p_dev->socket->pcmcia_state.present)
1436 goto out;
1437
1438 if (p_dev->_removed)
1439 goto out;
1440
1441 if (p_dev->suspended)
1442 goto out;
1443
1444 ret = p_dev;
1445 out:
1446 pcmcia_put_dev(p_dev);
1447 return ret;
1448 }
1449 EXPORT_SYMBOL(pcmcia_dev_present);
1450
1451
1452 static struct pcmcia_callback pcmcia_bus_callback = {
1453 .owner = THIS_MODULE,
1454 .event = ds_event,
1455 .requery = pcmcia_bus_rescan,
1456 .suspend = pcmcia_bus_suspend,
1457 .resume = pcmcia_bus_resume,
1458 };
1459
1460 static int __devinit pcmcia_bus_add_socket(struct device *dev,
1461 struct class_interface *class_intf)
1462 {
1463 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1464 int ret;
1465
1466 socket = pcmcia_get_socket(socket);
1467 if (!socket) {
1468 printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket);
1469 return -ENODEV;
1470 }
1471
1472 /*
1473 * Ugly. But we want to wait for the socket threads to have started up.
1474 * We really should let the drivers themselves drive some of this..
1475 */
1476 msleep(250);
1477
1478 #ifdef CONFIG_PCMCIA_IOCTL
1479 init_waitqueue_head(&socket->queue);
1480 #endif
1481 INIT_LIST_HEAD(&socket->devices_list);
1482 INIT_WORK(&socket->device_add, pcmcia_delayed_add_device);
1483 memset(&socket->pcmcia_state, 0, sizeof(u8));
1484 socket->device_count = 0;
1485
1486 ret = pccard_register_pcmcia(socket, &pcmcia_bus_callback);
1487 if (ret) {
1488 printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket);
1489 pcmcia_put_socket(socket);
1490 return (ret);
1491 }
1492
1493 return 0;
1494 }
1495
1496 static void pcmcia_bus_remove_socket(struct device *dev,
1497 struct class_interface *class_intf)
1498 {
1499 struct pcmcia_socket *socket = dev_get_drvdata(dev);
1500
1501 if (!socket)
1502 return;
1503
1504 socket->pcmcia_state.dead = 1;
1505 pccard_register_pcmcia(socket, NULL);
1506
1507 /* unregister any unbound devices */
1508 mutex_lock(&socket->skt_mutex);
1509 pcmcia_card_remove(socket, NULL);
1510 mutex_unlock(&socket->skt_mutex);
1511
1512 pcmcia_put_socket(socket);
1513
1514 return;
1515 }
1516
1517
1518 /* the pcmcia_bus_interface is used to handle pcmcia socket devices */
1519 static struct class_interface pcmcia_bus_interface = {
1520 .class = &pcmcia_socket_class,
1521 .add_dev = &pcmcia_bus_add_socket,
1522 .remove_dev = &pcmcia_bus_remove_socket,
1523 };
1524
1525
1526 struct bus_type pcmcia_bus_type = {
1527 .name = "pcmcia",
1528 .uevent = pcmcia_bus_uevent,
1529 .match = pcmcia_bus_match,
1530 .dev_attrs = pcmcia_dev_attrs,
1531 .probe = pcmcia_device_probe,
1532 .remove = pcmcia_device_remove,
1533 .suspend = pcmcia_dev_suspend,
1534 .resume = pcmcia_dev_resume,
1535 };
1536
1537
1538 static int __init init_pcmcia_bus(void)
1539 {
1540 int ret;
1541
1542 spin_lock_init(&pcmcia_dev_list_lock);
1543
1544 ret = bus_register(&pcmcia_bus_type);
1545 if (ret < 0) {
1546 printk(KERN_WARNING "pcmcia: bus_register error: %d\n", ret);
1547 return ret;
1548 }
1549 ret = class_interface_register(&pcmcia_bus_interface);
1550 if (ret < 0) {
1551 printk(KERN_WARNING
1552 "pcmcia: class_interface_register error: %d\n", ret);
1553 bus_unregister(&pcmcia_bus_type);
1554 return ret;
1555 }
1556
1557 pcmcia_setup_ioctl();
1558
1559 return 0;
1560 }
1561 fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that
1562 * pcmcia_socket_class is already registered */
1563
1564
1565 static void __exit exit_pcmcia_bus(void)
1566 {
1567 pcmcia_cleanup_ioctl();
1568
1569 class_interface_unregister(&pcmcia_bus_interface);
1570
1571 bus_unregister(&pcmcia_bus_type);
1572 }
1573 module_exit(exit_pcmcia_bus);
1574
1575
1576 MODULE_ALIAS("ds");
Support for the Chinese Samsung S3C2440 based development boards